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Method for removing phosphorus in water by using resin-loaded ferric oxide hydrate

A technology for hydrating iron oxide and removing water, which is applied in chemical instruments and methods, water/sewage treatment, adsorbed water/sewage treatment, etc. High adsorption efficiency, good adsorption effect, and the effect of less addition

Inactive Publication Date: 2019-12-13
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical precipitation method is to turn phosphate into insoluble salt and then precipitate it. This method needs to pay attention to the reaction pH, and the dosage of chemicals is large, resulting in a large amount of waste salt. There is a risk of secondary pollution during the treatment process. Biological phosphorus removal mainly uses biological Phosphorus is removed by biochemical action, and the phosphorus in water is removed through the ability of phosphorus-accumulating bacteria to absorb phosphorus. This process will produce a large amount of sludge, and phosphorus-containing sludge must be treated in time. The reaction environment has a great impact on the removal effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for removing phosphorus in water by using resin-loaded hydrated iron oxide, comprising the following steps

[0029] 1) Add 10 g of commercially available D301 resin (Xinyue Huamei Environmental Protection Technology Co., Ltd.) into 250ml of HCl with a mass fraction of 2% for ultrasonication, electric stirring at a rate of 120rpm / min for 3h, drying at 50°C, and passing through a 60-mesh sieve Standby, prepare 500ml (FeCl 3 , HCl, NaCl) three mixed solution, FeCl in the solution 3 The concentration is 3mol / L, the concentration of HCl is 1mol / L, and the concentration of NaCl is 1mol / L; add 10g of D301 resin to 500ml of FeCl 3 In the mixed solution, ultrasound in an ice bath, electric stirring reaction at a rate of 120rpm / min for 3h, after washing and drying at 50°C, put 10g of the resin treated in the previous step into the NaOH-NaCl mixed solution for reaction. The NaOH concentration in the solution is 1 mol / L, NaCl concentration 0.5 mol / L, ultrasonication in a...

Embodiment 2

[0034] A method for removing phosphorus in water by using resin-loaded hydrated iron oxide, comprising the following steps

[0035] 1) Add 13g of commercially available D301 resin (Xinyue Huamei Environmental Protection Technology Co., Ltd.) into 250ml of HCl with a mass fraction of 3% for ultrasonication, electric stirring at a rate of 120rpm / min for 3h, drying at 55°C, and passing through a 60-mesh sieve Standby, prepare 500ml (FeCl 3 , HCl, NaCl) three mixed solution, FeCl in the solution 3The concentration is 2mol / L, the concentration of HCl is 1mol / L, and the concentration of NaCl is 3mol / L; add 13g of D301 resin to 500ml of FeCl 3 In the mixed solution, ultrasound in ice bath, electric stirring reaction at a rate of 140rpm / min for 4h, after washing and drying at 55°C, add 13g of resin treated in the previous step into 500ml of NaOH-NaCl mixed solution for reaction, the concentration of NaOH in the solution The concentration of NaCl is 1mol / L, the concentration of NaCl ...

Embodiment 3

[0040] A method for removing phosphorus in water by using resin-loaded hydrated iron oxide, comprising the following steps

[0041] 1) Take 17g of commercially available D301 resin (Xinyue Huamei Environmental Protection Technology Co., Ltd.), add 250ml of HCl with a mass fraction of 4% to ultrasonic, stir at a rate of 160rpm / min for 4h, dry at 55°C, and pass through 60 mesh Sieve for later use, prepare 500ml (FeCl 3 , HCl, NaCl) three mixed solution, FeCl in the solution 3 The concentration is 3mol / L, the concentration of HCl is 2mol / L, and the concentration of NaCl is 3mol / L; add 17g of D301 to 500ml of FeCl 3 In the mixed solution, ultrasonically in an ice bath, electric stirring reaction at a rate of 160rpm / min for 3h, after washing and drying at 60°C, add 17g of the resin treated in the previous step to 500mlNaOH-NaCl mixed solution for reaction, the NaOH concentration is 2mol / L , with a NaCl concentration of 0.5mol / L, ultrasonication in an ice bath, stirring reaction a...

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Abstract

The invention relates to a method for removing phosphorus in water by using resin-loaded ferric oxide hydrate, which comprises the following steps: preparing a ferric oxide hydrate-resin (HFO-301) composite resin, adding the prepared HFO-301 resin into mixed wastewater containing inorganic phosphorus, HETP and TPhP, regulating the pH value, and carrying out oscillation reaction. The prepared HFO-301 composite resin can synchronously adsorb inorganic phosphorus and organic phosphorus, and the purpose of removing phosphorus-containing pollutants in water is achieved. The prepared HFO-301 can absorb inorganic phosphorus on one hand and can remove organophosphorus such as triphenyl phosphate (TPhP) and Hydroxyethylidene-1,1-diphosphonic acid (HEDP) on the other hand through non-specific electrostatic adsorption, ligand exchange and inner-layer complexing action. It is shown by researches that the prepared nano resin composite material has the advantages of low resin preparation cost, simple process, high treatment efficiency, wide pH application range, high stability and the like, and has great potential in the aspect of phosphorus-containing wastewater treatment.

Description

technical field [0001] The invention relates to the technical field of water pollution control, in particular to a method for removing phosphorus in water by using resin-loaded hydrated iron oxide. Background technique [0002] At present, a large amount of phosphorus-containing wastewater is produced in daily life and industrial production. The total phosphorus content of washing wastewater and industrial descaling agent wastewater far exceeds the standard. Once discharged into natural water bodies, it will cause water eutrophication and algal blooms. and other hazards, causing serious pollution to natural water bodies. The relevant national sewage discharge standards stipulate that after the sewage has undergone advanced treatment, the total phosphorus concentration in the discharged water shall not exceed 0.5mg / L. Look for high-efficiency phosphorus removal materials, and use supporting water treatment processes to effectively remove phosphorus in water to protect the st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/10C02F101/30
CPCB01J20/265C02F1/285C02F2101/105C02F2101/30
Inventor 徐炎华宋文斌刘壁铭刘珍雪滕月
Owner NANJING UNIV OF TECH
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